scholarly journals Phenomenology of two-texture zero neutrino mass matrices

2007 ◽  
Vol 76 (1) ◽  
Author(s):  
S. Dev ◽  
Sanjeev Kumar ◽  
Surender Verma ◽  
Shivani Gupta
Keyword(s):  
Neutrino Mass ◽  
Mass Matrices ◽  
Texture Zero

scholarly journals TEXTURE-ZERO MODEL FOR THE LEPTON MASS MATRICES

2012 ◽  
Vol 27 (28) ◽  
pp. 1250159 ◽  
Author(s):  
P. M. FERREIRA ◽  
L. LAVOURA
Keyword(s):  
Mass Spectrum ◽  
Neutrino Mass ◽  
Mass Matrix ◽  
Type I ◽  
Mixing Angle ◽  
Mass Matrices ◽  
Neutrino Mass Spectrum ◽  
Texture Zero ◽  
Vanishing Elements ◽  
Reactor Mixing

We suggest a simple model, based on the type-I seesaw mechanism, for the lepton mass matrices. The model hinges on an Abelian symmetry which leads to mass matrices with some vanishing matrix elements. The model predicts one massless neutrino and Meμ = 0 (M is the effective light-neutrino Majorana mass matrix). We show that these predictions agree with the present experimental data if the neutrino mass spectrum is inverted, i.e. if m3 = 0, provided the Dirac phase δ is very close to maximal (±π/ 2). In the case of a normal neutrino mass spectrum, i.e. when m1 = 0, the agreement of our model with the data is imperfect — the reactor mixing angle θ13 is too small in our model. Minimal leptogenesis is not an option in our model due to the vanishing elements in the Yukawa-coupling matrices.

scholarly journals Revisiting the texture zero neutrino mass matrices

2016 ◽  
Vol 2016 (12) ◽  
pp. 123B08 ◽  
Author(s):  
Madan Singh ◽  
Gulsheen Ahuja ◽  
Manmohan Gupta
Keyword(s):  
Neutrino Mass ◽  
Mass Matrices ◽  
Texture Zero

Understanding of two-zero textures of neutrino mass matrices in minimal extended seesaw mechanism and their symmetry realization

2019 ◽  
Vol 34 (11) ◽  
pp. 1950059 ◽  
Author(s):  
Mahadev Patgiri ◽  
Priyanka Kumar
Keyword(s):  
Neutrino Mass ◽  
Mass Matrix ◽  
Scalar Fields ◽  
Fermion Mass ◽  
Type I ◽  
Number Of Zeros ◽  
Mass Matrices ◽  
Texture Zero ◽  
Minimum Number ◽  
The Right

We study the texture zeros of [Formula: see text] neutrino mass matrices [Formula: see text] in the minimal extended type-I seesaw (MES) mechanism, incorporating one extra gauge singlet field “[Formula: see text]”. The [Formula: see text]  MES model deals with [Formula: see text]  [Formula: see text], [Formula: see text]  [Formula: see text] and [Formula: see text] mass matrix [Formula: see text] which couples the right-handed neutrinos and the singlet field “[Formula: see text]”. We carry out the mapping of all possible zero textures of [Formula: see text], [Formula: see text] and [Formula: see text] with the restriction to phenomenologically predictive cases having total eight zeros of [Formula: see text] and [Formula: see text] studied in the literature. If [Formula: see text], the sterile neutrino mass, is subject to any limit, further block diagonalization of [Formula: see text] shall not be allowed to reduce it to a [Formula: see text] matrix. In [Formula: see text]  [Formula: see text] scenario, the study of texture zero is totally different and interesting. With this motivation, we consider the [Formula: see text] scheme where the digits of the pair represent the number of zeros of [Formula: see text] and [Formula: see text], respectively, along with the one/two-zero textures of [Formula: see text]. There are a large number of possibilities of zeros of fermion mass matrices, but the implementation of [Formula: see text] transformations reduces it to a very minimum number of basic structures. As the [Formula: see text] MES matrix is a matrix of rank 3, so we consider only those textures with two zeros which are of rank 3 whereby the number of feasible zero textures reduces to 12, out of 15. On realizing these 12 textures under MES mechanism with [Formula: see text] picture, we arrive at certain correlations for each texture. We examine the viability of each texture by scanning their respective correlations under recent neutrino oscillation data. Also, we discuss the interplay of Dirac and Majorana CP phases in determining the viability of a texture. The allowed two-zero textures are finally realized using a discrete Abelian flavor symmetry group [Formula: see text] with the extension of Standard Model to include some scalar fields.

Texture zero mass matrices and nature of neutrinos

2018 ◽  
Vol 33 (31) ◽  
pp. 1844032
Author(s):  
Gulsheen Ahuja ◽  
Manmohan Gupta
Keyword(s):  
Comparative Study ◽  
Neutrino Mass ◽  
Parameter Space ◽  
Neutrino Masses ◽  
Normal Hierarchy ◽  
Mixing Angles ◽  
Zero Mass ◽  
Mass Matrices ◽  
Texture Zero

For Majorana as well as Dirac neutrinos, attempt has been made to carry out a comparative study of the predictions of Fritzsch-like texture 6, 5 and 4 zero leptonic mass matrices. In particular, considering normal hierarchy of neutrino masses, we have examined how the parameter space available to the mixing angles with respect to the lightest neutrino mass changes for the two types of neutrinos.

scholarly journals Neutrino mass matrices with a texture zero and a vanishing minor

2010 ◽  
Vol 81 (5) ◽  
Author(s):  
S. Dev ◽  
Surender Verma ◽  
Shivani Gupta ◽  
R. R. Gautam
Keyword(s):  
Neutrino Mass ◽  
Mass Matrices ◽  
Texture Zero

scholarly journals Neutrino mass matrices with one texture zero and a vanishing neutrino mass

2015 ◽  
Vol 92 (1) ◽  
Author(s):  
Radha Raman Gautam ◽  
Madan Singh ◽  
Manmohan Gupta
Keyword(s):  
Neutrino Mass ◽  
Mass Matrices ◽  
Texture Zero

scholarly journals Neutrino mass matrices from two zero 3 × 2 Yukawa textures and minimal d = 5 entries

2016 ◽  
Vol 31 (13) ◽  
pp. 1650077 ◽  
Author(s):  
Avtandil Achelashvili ◽  
Zurab Tavartkiladze
Keyword(s):  
Neutrino Mass ◽  
Mass Matrix ◽  
Neutrino Mass Matrix ◽  
Light Neutrino ◽  
Tree Level ◽  
Cp Asymmetry ◽  
Mass Matrices ◽  
Light Neutrino Mass ◽  
Texture Zero ◽  
Predictive Relations

Aiming to relate leptonic CP violating phase [Formula: see text] to the cosmological CP asymmetry, we study the extension of MSSM by two quasi-degenerate (strictly degenerate at tree level) right-handed neutrinos and consider all possible two texture zero [Formula: see text] Yukawa matrices plus one [Formula: see text] dimension five [Formula: see text] operator contributing to the light neutrino mass matrix. We classify all experimentally viable mass matrices, leading to several predictions, and analytically derive predictive relations. We also relate the CP violating [Formula: see text] phase to the CP phase of the thermal leptogenesis.

Sign in / Sign up

Export Citation Format

Share Document